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Rapid determination of polarity sense by an energy‐dispersive diffractometer
Author(s) -
Hosoya S.,
Fukamachi T.
Publication year - 1973
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889873008940
Subject(s) - diffractometer , polarity (international relations) , sense (electronics) , energy (signal processing) , materials science , analytical chemistry (journal) , chemistry , chromatography , physics , crystallography , biochemistry , crystal structure , quantum mechanics , cell
The polarity sense of the non‐centrosymmetric GaP crystal has rapidly been determined by use of an energy‐dispersive diffractometer by choosing a suitable scattering angle, where the anomalous scattering is heavy, for example for the 333 and reflections in a pair of measurements. The main merits of this method are: (1) The necessary scaling is easily carried out by use of the intensity of even reflections observed simultaneously; (2) Unwanted fluorescence contributions can generally be separated. These make the conclusion more reliable. It was thus established that the less shiny surface is the Ga side when a 111 plate of GaP is treated by an etchant (HF:HNO 3 = 5:1).